Qtjartz-cbushee



A- J. DOOLITTLE.

Ore Stamp.

No. 21,248. r Patented Aug. 24, 1858.

AM. PHOTC-LITHOJQ N.Y (OSBDRNE'S PROCESS onion.

A. J. DOOLITTLE, OF NEVADA TOWNSHIP, CALIFORNIA.

I QUARTZ-CRUSHER.

Specification of Letters Patent No. 21,248, dated August 24, 1858.

To all whom it may concern:

Be it known that I, A. J. DOOLITTLE, of Nevada township, in the countyof Nevada and State of California, have invented certain new and usefulImprovements in Machinery for Crushing Quapt-z and other Substances; andI do hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the annexed drawings,making a part of this specification, in which- Figure 1, represents avertical, longitudinal central section of my improvements, and Fig. 2,is a front elevation of the same.

Similar letters of reference indicate corresponding parts in the twofigures.

This invention consists in employing flat springs to which the stampersare connected for the double purpose of guiding the stampers in their upand down motion and of increasing the force of the blow, and it furtherconsists in so arranging the pans or mortars, that the finer parts ofthe quartz or other substance to be crushed can escape by openings madeinto the sides of the pans, so that the larger lumps are always exposedto the full force of the blow, these openings in different pans to begradually decreasing in size so as to effect the required degree offineness by the time the substance has passed through several of thesepans, which are placed loosely under the stampers.

To enable others skilled in the art to fully understand and construct myimprovement I will proceed to describe it.

On a suitable platform A, several upright standards B, B, and B, arerigidly attached in such a position that the two standards B, B, servefor bearings to the horizontal shaft O. The standard B, forms thesupport for two flat steel springs D, D, which are rigidly fastened tosaid standard one near its top and the other near to its center. Thestem a, of the stamper E, passes through the front ends of these springsand two collars b, b, are rigidly attached to the stem 0;, which preventthe springs from slipping down on the stem of the stamper.

F, represents a Wiper which is attached to the shaft C, in such aposition, that it strikes against the under side of the collar 6, andthe cams of this wiper are so shaped that they lift the stamper to therequired height and let it drop quite suddenly. During this up and downmotion the stems of the stampers are guided by the springs D, D, noother guides being required to secure a perpendicular motion of thestampers and the force of the blow is increased at the same time by theaction of these springs.

G, is one of the pans or mortars, which I employ, and which I considerdifferent from those heretofore used and superior to the same in greatlyfacilitating the operation of crushing. Long narrow openings 0, are outinto the sides of the pan all around, which allow the finer parts of thesubstance in the pan to drop out and expose the coarser parts to thefull force of the blow. Without these openings the coarser parts beingthe heaviest accumulate near to the bottom of the pan, while the fineparts cover the same over and the stampers can not operate with theirfull power on the coarse parts as these are to some extent protected bythe dust and fine parts with which they are covered.

The openings 0, in my pans are graduated according to the state offineness in which the substance to be crushed is put into said pans, andthose parts which escape from one pan are put into another one withfiner openings until all the parts are reduced to the required fineness.These pans are placed loosely under the stampers, so that they are freeto revolve under the force of the blows, whereby the operation ofcrushsing is facilitated and the face of the stampers saved.

I do not claim the employment of springs for the purpose of increasingthe force of the blow as this can be seen with many similar machines,neither do I claim broadly the openings in. the pans. But

hat I claim as my invention and want to secure by Letters Patent, is-

Arranging the stampers of a quartz crusher in such a manner that theyare guided in their up and down motion by two springs which at the sametime serve to increase the force of the blow, in combination with panswhich are placed loosely under the Stampers, so that they are free torotate under the action of the blows and which have openings in theirsides the size of which is different for different pans and depends uponthe relative coarseness of the quartz, so that the finer parts of thequartz escape and the coarser ones are continually 5 exposed to the fullforce of the blows, the Whole being arranged substantially as herein N.F. SCOTT, LEWIS SHRANQKSON.

